Best Archival Method?

[cooltouch]

I'm placing this message in Post Processing Central because it seems to be the best fit.

For the past several months, I've been working at archiving my film images by scanning or digitally duplicating them and then burning them to DVD.

I just read through a thread over at photo.net where several folks mention that they do not archive to DVD or CD because they tend to go bad after a few years, and the data is no longer available.

I wonder about this, and I'm looking for a fresh perspective, hence my asking the question here.

I have CDs (music and computer applications) that are over 20 years old and that still work fine, and I have movie DVDs that are at least 8 years old and still work fine. So what's up with a DVD or CD that's being used as data storage going bad after only two or three years?

Have any of you run into this?

Or more importantly, so I don't potentially waste any more of my time, what archive methods do you prefer?

[Hogleg 44]

I have a music CD that I burned 10 years ago, and it plays flawlessly in my car CD changer to this day.
I have been backing up to several hard drives at once, then I store them in different locations. Some at home, some at my kids homes. Then I have most online at SmugMug and Phanfare as well. Over 250 GB's of BU duped at each site.